logout inactive on exteranal auth

pytorrent/routes/main.py

@@ -195,6 +195,9 @@ def login():
 
 @bp.get("/logout")
 def logout():
+    # Note: External providers such as Tinyauth own the login session, so pyTorrent must not pretend to log the user out locally.
+    if auth.uses_external_provider():
+        return redirect(url_for("main.index"))
     auth.logout_user()
     if not auth.enabled():
         return redirect(url_for("main.index"))
@@ -212,6 +215,8 @@ def index():
         bootstrap_themes=BOOTSTRAP_THEMES,
         font_families=FONT_FAMILIES,
         auth_enabled=auth.enabled(),
+        auth_provider=auth.provider(),
+        external_auth=auth.uses_external_provider(),
         current_user=auth.current_user(),
     )